中文版 | English
CSpace
1D porous tubular g-C3N4 capture black phosphorus quantum dots as 1D/0D metal-free photocatalysts for oxytetracycline hydrochloride degradation and hexavalent chromium reduction
Wang, Wenjun1,2; Niu, Qiuya1,2; Zeng, Guangming1,2; Zhang, Chen1,2; Huang, Danlian1,2; Shao, Binbin1,2; Zhou, Chengyun1,2; Yang, Yang1,2; Liu, Yuxin3,4; Guo, Hai1,2
2020-09-15
摘要As an "up-and-coming" two-dimensional (2D) material, black phosphorus (BP) has attracted much attention due to its abundant metal-free properties and broad application prospects in photocatalysis. This study introduces a promising sunlight-driven metal-free photocatalyst for oxytetracycline hydrochloride degradation and hexavalent chromium reduction in water and wastewater. The roles of BP quantum dots (BPQDs) in the distribution of electrons and photocatalytic performances were well identified by experimental and density functional theory (DFT) calculations. As expected, the specially designed 0D/1D structure shows unusual photocatalytic efficiency toward the degradation of oxytetracycline hydrochloride (0.0276 min(-1)) and reduction of hexavalent chromium (0.0404 min(-1)). Reactive species, namely, O-center dot(2)- and h(+) comprised the primary photocatalytic mechanisms for oxytetracycline hydrochloride degradation. This work highlights that the combination of tubular g-C3N4 (TCN) with BPQDs facilitates the charge spatial separation in the photocatalytic process, and provides alternative strategy for design of highly active and metal-free nanomaterials toward environmental remediation and sustainable solar-to-chemical energy conversion.
关键词BPQDs Tubular g-C3N4 Cr(VI) reduction Oxytetracycline hydrochloride Density functional theory
DOI10.1016/j.apcatb.2020.119051
发表期刊APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
卷号273页码:13
通讯作者Zeng, Guangming(zgming@hnu.edu.cn) ; Zhang, Chen(zhangchen@hnu.edu.cn)
收录类别SCI
WOS记录号WOS:000536933200016
语种英语